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United States Patent | 5,228,825 |
Fruchtbaum ,   et al. | July 20, 1993 |
There is disclosed a flange or pressure vessel closure device and method for deheading a coke drum. The coke drum deheading device has an annular retaining element spring biased from a lower flange of a coke drum, and a plurality of hooks which extend from the retaining element to engage a cradle holding the bottom head against the flange. When it is desired to disengage the head from the flange, the hook retaining element is moved by a first set of cylinders toward the flange to release tension from the hooks so that they can be disengaged from the bottom head by pivoting them outwardly using a second set of cylinders or other hook pivoting means. The bottom head can then be disengaged from the flange, lowered and moved laterally away from the coke drum on a hydraulic table.
Inventors: | Fruchtbaum; Joseph (Houston, TX); Kronmiller; Frederick B. (Tomball, TX) |
Assignee: | The M. W. Kellogg Company (Houston, TX) |
Appl. No.: | 786693 |
Filed: | November 1, 1991 |
Current U.S. Class: | 414/684.3; 292/25; 413/45 |
Intern'l Class: | C10B 043/02 |
Field of Search: | 414/684.3,589 220/200 202/244,245 29/700,728 292/25,45,256.65 413/26,45,3 |
4519635 | May., 1985 | McMath | 29/428. |
Foreign Patent Documents | |||
1076373 | Feb., 1984 | SU | 220/200. |